Potassium deficiency-Canola

Symptoms
Before specific symptoms occur, potassium deficiency causes growth and yield depressions of the plants. Younger leaves remain smaller, and later, growth of the plants is stopped. Specific deficiency symptoms occur on medium/older leaves first. They show chlorotic zones on the leaf margins which become necrotic later. The younger leaves get a blue-green colour.

Reasons
Potassium deficiency. Mg deficiency also shows chlorosis and necrosis on older leaves, but these start from the middle part of the leaf whereas K deficiency symptoms occur on the leaf margins first.

Symptoms
Before specific symptoms occur, potassium deficiency causes growth and yield depressions of the plants. Younger leaves remain smaller, and later, growth of the plants is stopped. Specific deficiency symptoms occur on medium/older leaves first. Starting from the marginal area, the leaves become chlorotic and subsequently show necrotic spots and patches. The necrotic tissue can show a pale, light brown colour, similar to sun burn damage.

Reasons
Potassium deficiency. Mg deficiency also shows chlorosis and necrosis on older leaves, but these start from the middle part of the leaf whereas K deficiency symptoms occur on the leaf margins first.

Symptoms
Leaves remain smaller and growth of the plants is reduced. Specific deficiency symptoms occur on medium/older leaves first. They show chlorotic zones on the leaf margins which spread towards the leaf base and become necrotic later on. A reddish/purple discoloration appears along the marginal area. Young leaves get a blue-green color.

Reasons
Potassium deficiency. Mg deficiency also shows chlorosis and necrosis on older leaves, but these start from the middle part of the leaf whereas K deficiency symptoms occur on the leaf margins first.